Which example involves a phase change in which heat energy is released by the substance? Ofreezing ice cream
O cooking a pot of soup
O melting ice under sunlight
O watching frost disappear into air

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What is the percent by mass of oxygen in fe2o3

What produces wave a)sound b) heats c)transfer of energy d)vibrations